JL
Joseph Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Joseph Leonard across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Joseph & Mary — first a son (b.~1912), then head of a 11-person household.
Age 28
b. ~1912
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Leonard |
| Given Name | Joseph A |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | attendant |
| Industry | hospital |
| Class of Worker | GW |
| Hours Worked | 47 |
| Income (1939) | 1080 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Attendant |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1912 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| William Leonard | Son | — | 25 | ~1915 |
| Marion Leonard | Daughter | — | 20 | ~1920 |
| Helen Leonard | Daughter | — | 21 | ~1919 |
| Elizabeth Leonard | Daughter | — | 14 | ~1926 |
| Joseph Leonard | Son | — | 28 | ~1912 |
| Virginia Leonard | Daughter | — | 15 | ~1925 |
| John Leonard | Son | — | 27 | ~1913 |
| Mary Leonard | Spouse | — | 51 | ~1889 |
| Maryrose Leonard | Daughter | — | 10 | ~1930 |
| Joseph Leonard | Head | — | 56 | ~1884 |
| Louis Leonard | Son | — | 18 | ~1922 |
Census Appearances
1920
Jefferson, Kentucky
Son, age 8
Jefferson, Kentucky · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Son, age 18
Jefferson, Kentucky · implied b. ~1912 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Stock Boy |
| Industry | Department Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Son, age 28
Jefferson-County, Kentucky · implied b. ~1912 — 11 household members
| Surname | Leonard |
| Given Name | Joseph A |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | attendant |
| Industry | hospital |
| Class of Worker | GW |
| Hours Worked | 47 |
| Income (1939) | 1080 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Joseph Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Leonard (~0.92 confidence) and mother Mary Leonard (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Leonard
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Mary Leonard
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Leonard
Son · 1940 · age 28 · b. ~1912 · Kentucky
★ You are viewing this record
Sibling
Marion Leonard
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Leonard
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Leonard
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Leonard
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Leonard
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maryrose Leonard
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Leonard
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Leonard
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01375-00110)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joel Dee Stranburg | 15 | daughter | — | Arkansas |
| 2 | Grace Stranburg | 8 | daughter | — | Tennessee |
| 3 | Joel Jr Stranburg | 2 | son | — | Kentucky |
| 4 | Rozella Eatmon | 43 | head | Chauffeur | North Carolina |
| 5 | Fern I O Eatmon | 40 | wife | — | Indiana |
| 6 | Rozella S Jr Eatmon | 19 | son | Clerk | Texas |
| 7 | Edward M Eatmon | 16 | son | — | Kentucky |
| 8 | Juanita F Eatmon | 15 | daughter | — | Kentucky |
| 9 | Russell P Mcnichols | 31 | head | Carpenter Helper | Kentucky |
| 10 | Clara H Mcnichols | 24 | wife | — | Indiana |
| 11 | Amos L Hatfield | 59 | head | Watchman | Tennessee |
| 12 | Maude Hatfield | 49 | wife | — | Tennessee |
| 13 | Dorothy K Hatfield | 26 | daughter | Waitress | Tennessee |
| 14 | Violet T Hatfield | 19 | daughter | Operator | Tennessee |
| 15 | Mildred C Hatfield | 17 | daughter | — | Tennessee |
| 16 | Edna J Hatfield | 14 | daughter | — | Tennessee |
| 17 | Robert L Hatfield | 12 | son | — | Tennessee |
| 18 | Dudley H Hatfield | 10 | son | — | Tennessee |
| 19 | Joseph W Leonard | 56 | head | Fireman | Kentucky |
| 20 | Mary A Leonard | 51 | wife | — | Kentucky |
| 21 | Joseph A Leonard THIS PERSON | 28 | son | Attendant | Kentucky |
| 22 | John F Leonard | 27 | son | Blue Print Operator | Kentucky |
| 23 | William J Leonard | 25 | son | Canvas Man | Kentucky |
| 24 | Helen C Leonard | 21 | daughter | New Worker | Kentucky |
| 25 | Marion A Leonard | 20 | daughter | New Worker | Kentucky |
| 26 | Louis P Leonard | 18 | son | — | Kentucky |
| 27 | Virginia A Leonard | 15 | daughter | — | Kentucky |
| 28 | Elizabeth M Leonard | 14 | daughter | — | Kentucky |
| 29 | Maryrose Leonard | 10 | daughter | — | Kentucky |
| 30 | Roscoe Paris | 52 | head | Barber | Kentucky |
| 31 | Gertrude E Paris | 42 | wife | Beauty Operator | Kentucky |
| 32 | Roscoe Shirley Paris | 15 | son | — | Kentucky |
| 33 | Thelma M Paris | 13 | daughter | — | Kentucky |
| 34 | William E Hopkins | 31 | head | Stationary Fireman | Kentucky |
| 35 | Elizabeth N Hopkins | 27 | wife | — | Kentucky |
| 36 | Sherl W Hopkins | 10 | son | — | Kentucky |
| 37 | Robert E Hopkins | 7 | son | — | Kentucky |
| 38 | Donald E Hopkins | 5 | son | — | Kentucky |
| 39 | Nelie E Kennedy | 62 | head | — | Kentucky |
| 40 | Chester P Kennedy | 21 | son | Counterman | Kentucky |
Related Census Records
Pedigree Summary
Joseph + 8 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)